body {
    font-size: 20px;
    color: green;
    .img1{
        background: url(./img/1.jpg) no-repeat;
        width: 300px;
        height: 200px;
    }
    .img2{
        background: url(./img/2.jpg) no-repeat;
        width: 300px;
        height: 200px;
    }
}